Do You Need a Trademark to Sell on Trendyol, Hepsiburada and N11?

For thousands of businesses selling on online marketplaces, trademark registration is no longer something you can put off until later. Trendyol, Hepsiburada, N11 and similar platforms now tie product listing, brand page setup and anti-counterfeiting tools directly to your registration certificate. This article covers why trademark registration is critical for marketplace sellers, which classes you need, and how to fight infringement effectively.

Why Does Your Brand Matter So Much on a Marketplace?

In a physical store, your competitor cannot walk into your shop window. On a marketplace, the situation is different: several sellers can appear on the same product page, listings can go up under a similar name, and search results for your brand name can surface someone else's products.

Registration delivers three concrete benefits in this environment. First, it lets you take control of your product page. Second, it gives you the right to have counterfeit and unauthorised listings removed. Third, it lets you object when your brand name is used by others in ads and search results.

How Do Brand Protection Programs Work?

Every major marketplace runs a protection program for brand owners. The names differ, but the logic is similar:

1. The brand owner applies to the program with a registration certificate.
2. The platform verifies brand ownership.
3. The brand owner gains privileged control over listings under their brand.
4. They can request removal of unauthorised listings by filing an infringement notice.

Admission to these programs generally requires a registered trademark. Some platforms accept pending applications on a limited basis, but permanent protection requires a completed registration. We covered the Amazon-specific process in our article on Trademark Registration for Amazon Brand Registry.

Which Classes Should You Register?

The most common mistake marketplace sellers make is registering only in class 35. Class 35 protects the retail and sales service — not the use of the mark on the product you sell.

The correct combination is:

Because TÜRKPATENT's fee structure covers the first two classes under the same filing fee, this pairing costs most sellers nothing extra. In other words, getting the protection right costs almost the same as getting it wrong.

We covered the scope of class 35 in detail in our Class 35 Trademark Registration article.

If You Use a Contract Manufacturer

A large share of marketplace sellers do not manufacture their own products; they use a contract manufacturer and sell under their own label. This model does not affect your trademark rights — what matters is that the product is placed on the market under your brand.

There are two risks here, though. First, the manufacturer may supply the same product to other sellers. That's a commercial problem, but if your mark is registered, the manufacturer cannot sell under your brand. Second, the manufacturer may register your mark in its own name. This risk is real in supplier relationships, and the fix is simple: file your trademark application before the manufacturing relationship begins.

Fighting Counterfeits and Unauthorised Listings

The right approach depends on the type of infringement you're facing:

• A seller listing your product without authorisation: Filing an infringement notice through the platform's brand protection program is the fastest route.
• A seller selling counterfeits of your brand: In addition to a platform notice, consider a criminal complaint. See Trademark Infringement: Criminal Penalties in Turkey.
• A competitor using your brand name in ads: Combine the platform's advertising policies with objections based on your trademark rights.
• A seller opening a store under a similar name: A notice based on your trademark rights, and legal action if necessary.

Collecting evidence properly matters when you file a notice: keep the exact URL of the product page, the date and time, the seller's details and, if possible, an invoice from a test purchase. A test purchase is especially valuable — it documents both that the product is genuinely counterfeit and the seller's identity at the same time. Once the product arrives, keep the shipping label, invoice and packaging intact.

Where notices go nowhere, or the same seller keeps relisting under different accounts, you need to move beyond the platform's internal process and into legal action. Against a business that systematically produces counterfeits, simply getting listings taken down does not solve the problem — you need to go after the source.

What You Can't Do Without a Registered Trademark

• You cannot be admitted to brand protection programs.
• You cannot effectively remove counterfeit sellers; the platform will not recognise you as the rights holder.
• You cannot control the content of your own product page.
• You cannot object to other stores opened under your brand name.
• You cannot file a criminal complaint; criminal protection is reserved for registered trademarks.
• You cannot expand into overseas marketplaces as a branded seller.

We compiled the concrete costs of staying unregistered in 10 Risks of Not Registering Your Trademark.

Should Your Store Name Match Your Brand Name?

On marketplaces there are two separate names: your seller store name and the brand on your products. They don't have to be identical, but it's a strong choice if they are.

When they differ, a typical problem emerges: your store name becomes well known, but only your product brand is registered. In that case you may have no effective footing against a seller who copies your store name. The reverse is also true: registering only the store name and leaving the product brand unprotected leaves the door open for others to label your products.

The soundest approach is to build a portfolio plan covering every name you use in sales — store name, product line name, and master brand.

Buy Box and Product Page Control

On marketplaces, several sellers can appear on the same product page, and the sale is routed to whichever seller meets certain criteria. When other sellers gain access to the page for a product you manufacture under your own brand, it both undermines price competition and weakens your control over the customer experience.

Trademark registration works two ways here. On one hand, joining the platform's brand protection program gives you privileged control over the product page content; on the other, it gives you a legal footing for demanding removal of unauthorised sellers. An unregistered seller has access to neither.

Timing: When Should You Apply?

The right time is before you start selling. The reason: trademark priority is determined by the filing date, and selling on a marketplace makes your brand visible. Once your product starts selling well, you become more likely to run into third parties trying to register the same name.

Since registration typically takes 6–12 months, applying only after you start selling condemns you to a long unprotected period. We covered the timeline in How Long Does Trademark Registration Take?

Expanding to Overseas Marketplaces

Trademark protection is territorial. Your Turkish registration does not automatically give you rights on overseas marketplaces. Expanding into Europe requires an EU trademark; expanding into the US requires a USPTO registration.

We compared the options in our articles on the EU Trademark (EUTM), US Trademark Registration and the Madrid Protocol. Since the Madrid System lets you reach multiple countries through a single application, it's generally the most efficient route for growing e-commerce brands.

Checklist for Marketplace Sellers

1. Is your brand name available in the register? Search it along with its variations.
2. Have you planned your product class together with class 35?
3. Will the registration be filed in the name of the entity that actually sells?
4. Will the logo and the word mark be protected separately?
5. Have you planned to enrol in brand protection programs after registration?
6. Will you set up bulletin monitoring?

Secure Your Brand Before You Start Selling

A marketplace quickly separates sellers who protect their brand from those who don't. A registered seller controls their product page, gets counterfeiters removed, and grows their brand; an unregistered seller becomes a victim of their own success.

At Webx, we manage the entire process for e-commerce and marketplace sellers — from class strategy to the registration certificate, from brand protection program enrolment to infringement monitoring. Explore our trademark registration service or request a free class analysis.